>>548894 samefagginI use a 8x10 sheet of polyurethane (PU) with clips, but it's pretty cumbersome. Though that makes for good exercise while backpacking.
Downside to a bag with a built in bugnet is you can't take it off for relaxing. Also bring an air mat. I have a gigantic old model thermarest, you've got to keep your butt above the wind. Found that out the hard way backpacking.